Galvanic battery



'(.N'o Modell.)

'0. L. CLARKE.

GALVANIG BATTERY. No. 298,175. Patented May-'6, 1884.

FIGJ.

UNITED TATES PATENT OFFICE.

CHARLES L. CLARKE, OF MANCHESTER,

COUNTY OF LANCASTER, ENGLAND,

OF BOSTON, MASSACHUSETTS.

GALVANIC BATTERY.

SPECIFICATION formingpart of Letters @Patent No. 298,175, dated May 6, 1884.

Application tiled N ovemberl, 1883. (No model.)

To all whom it may concern:

Beit known that I, OHARLEs Leren CLARKE,

a subject of the Queen of Great Britain, and

residing at Manchester, county of Lancaster', England, have invented Improvements in Galvanic Batteries, of which the following is a speeication.

My invention relates to improvements in galvanie batteries used for telephones and va- Io rions other purposes Where a weak current only is required, the object being to economize the cost and to reduce the size thereof, and consequently the space required for a battery oi' this description.

The invention consists, principally, in the use of an oxide of mercury (either alone or mixed with powdered or granulated carbon) as the dcpolariziug agent in a galvanic cell, in combination with an exciting-'Huid composed 2o of potassic or sedie hydrate dissglvedlin wa- The manner of carrying my invention into practical eHect will be readily understood on reference to the accompanying drawings and thefollowing description or explanation; thereof-that is to say: f i,

Figure l on the annexed drawings is a vertical section of a single-cell galvanic battery made according to my invention, and Fig. 2

3o is a similar view of a slight modification of the same. ,i L,

In carrying my inventionl into practice I take a quantity of mercurio or mereurous oxide, a a, Fig. 1, (either alone or mixed with 3 5 carbon in the form of powder or granules) and I pack it around a carbon rod, b b, or around a carbon plate in a porous eell, c c, the mouth being closed with cement eX cx, the mercury oxide being the depolarizing agentand the earbon being the negative electrode. If a single carbon rod be employed, as shown at Fig. l,

of copper or iron, so Athat it may with advantage be iluted, so as to increase its surface. The positive electrode may be a zine rod, d d, or a plate placed outside the porous cell c c; orv it may be a zinc cylinder surrounding it. The exciting-fluid is a solution of potassic or sodic hydrate of suitable strengtl1,and is placed in the outer cell, ee.

It will be evident that this arrangement may be varied When preferred-for instance, see 5o Fig. 2, wherein two carbon rods, b b, packed with the depolarizing agent a a, are placed outside the porous cell c c, and the zinc rod d d inside the latter, in which the exciting-fluid is alsovplaced. 5 5

I prefer to make the connection to the negative electrode b b by drilling a hole in the carbon and pouring in mercury, into which the lower end of a binding-screw may dip, as

shown at f f, Fig.

1, the precaution being 6o talen of having this part el" the screw made the mercury will not destroy it. In Fig. 2 the ends of the wires are shown as dipping into the mercury in the holes formed in the upper ends of the carbon rods b b.

I do not wish to claim, broadly, combining potassio or sodie hydrate as the exciting-Huid with any depolarizing agent; but

I claim as my invention- 7o A galvanic cell having an oxide of mercury as the depolarizing agent, and a solution of potassio or sodio hydrate as the exciting-duid, substantially as set forth.

'In testimony whereofI have signed my name 75 to this specification in the presence, of two subscribing witnesses.

cHAs. L. CLARK-R.

Witnesses:

GEORGE DAvIEs, CHARLES Dnvrns. 

